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wonder below line why doesn't work
echo "alias ls='ls --color'">>~/.profile
There are 2 alternatives - vote for the best!
If you can do better, submit your command here.
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There are so many things wrong with this command.
There's a space before the equals sign, so the alias command won't work.
"ls -G" just hides the group info (for GNU ls).
echo '\n' will display the characters backslash and 'n' unless you use echo -e
But, you don't even need it, because echo will automatically give you a new line.